I have a vast music collection, which all work fine--- However... My videos that I've imported...

The video plays for about three, or four seconds. Then-- it lags. So, when the video resumes the audio is not in sync with the video.. Which sucks. . =/ I'm hoping that someone here could help me with this but with my luck, it's probably the one T-10 in the whole world that does that. Lol.